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NHTSA closes Ford F-150 EcoBoost acceleration probe

Typically when we report on the findings of an investigation from the National Highway Traffic Safety Administration, it's because the government body has discovered a safety issue and prescribed a recall. In this case, however, NHTSA has closed an investigation into a reported performance deficit without ever getting to the recall stage.
The issue revolves around the Ford F-150 - specifically those equipped with the 3.5-liter EcoBoost engine - of which some 360,000 were built in the 2011, 2012 and 2013 model years. After receiving an initial 95 complaints, NHTSA opened an investigation last May - almost a year ago - into the reported issue of reduced engine power under hard acceleration. The agency has since received a total of 525 such complaints, and Ford itself reported receiving over 4,000.
Together, NHTSA and Ford determined that the problem resulted from cylinders misfiring, an issue itself stemming from water getting into the charge air cooler (CAC) mated to the turbochargers. In particularly humid or rainy conditions, water was found to get into the CAC, causing some of the cylinders to misfire, which in turn triggered the ECU to disable those cylinders in order to protect the catalytic converter from damage.

Diesel Power finds the ultimate modified oil-burner

For nine years, Diesel Power magazine has run the Diesel Power Challenge, this year's grindfest being "a week-long torture test that features seven events, nine trucks, 8,000 horsepower, and nearly 15,000 pound-feet of torque." The road to being crowned "the most powerful truck" starts with a dyno run, and then continues through the completion of a CDL-style obstacle course, an eighth-of-a-mile drag race while towing a 10,000-pound trailer, a quarter-mile drag race without a trailer, a fuel economy test in the mountains and finally a sled-pulling test through a 300-foot-long packed-mud pit.
What kind of trucks get into such a fight? Last year's winner, for instance - who upgraded his truck this year to prove he didn't "luck into the win" - drives a 2008 Ford F-250 Super Duty with a 6.4-liter Power Stroke V8 upgraded with a custom intake, Elite Diesel triple turbos and a two-stage nitrous system. Another competitor has a 2005 Dodge Ram 2500 powered by a 5.9-liter Cummins inline-six, upgraded with Garrett turbos, dual-stage nitrous, a seven-inch exhaust stack and twin fans built into the bed to cool the Sun Coast Omega transmission. The numbers on that truck: 1,255 horsepower, and 2,063 pound-feet of torque at the wheels. Naturally, as the image above might suggest, things don't always end well.
You'll find all five videos covering this years challenge below. A scene in the dyno video sums it all up perfectly: a competitor leaves his nitrous on too long and the crew is treated to some ominous poppings, he leans out the window, throws both hands up and shouts, "Amer'ca!"

2015 Ford F-Series Super Duty Power Stroke

What weighs 30,000 pounds? Big Ben's Westminster bell. A navy ship anchor. Or as we found out during our first drive program for the 2015 Ford F-Series Super Duty, seven pallets of cinder blocks loaded onto a dual-axle gooseneck trailer. The test was part of a raft of towing demonstrations that showcased the new Super Duty's impressive tug capacity, which maxes out at 32,100 pounds. That's 1,200 more than its nearest rival, the Ram 3500, when equipped with its upgraded 6.7-liter Power Stroke diesel V8. Such is the heavy-duty pickup truck business, a diesel-fueled game of one-upmanship with only three players: Ford, Chevrolet/GMC and Ram. And in this game, the one with the most torque wins.
Until 2014, Ford was the one to beat, with its 6.7-liter Power Stroke diesel bringing 400 hp and a massive 800 lb-ft of torque to the table. Then last year, Ram did exactly that, serving Ford with a beefed-up Cummins turbodiesel inline-six in its freshened Ram Heavy Duty truck line with 385 hp and 850 lb-ft of torque, enabling it to tow up to 30,000 pounds. But Ford claims it had designed its engine to be relatively easy to upgrade when the time called for it, so for 2015, Ford bolted a larger turbo to the Power Stroke, bringing output to an insane 440 hp and 860 lb-ft of twist, all without reducing fuel efficiency. Maximum tow capacity rises from 24,700 lbs to an incredible 31,200 lbs for the F-450 dually.
As for GM's HDs? They lag behind the lot with their 6.6-liter Duramax V-8, producing 397 hp and 765 lb-ft of torque. Yeah, you know things are serious when the trucks with 765 lb-ft are the knock-kneed wimps of the lot.